Battalion Foot Soldier + Phyrexian Altar + Wheel of Sun and Moon + Heartless Summoning

Battalion Foot Soldier

Phyrexian Altar

Wheel of Sun and Moon

Heartless Summoning

How it works

1. Cast Battalion Foot Soldier by paying .
2. When Battalion Foot Soldier enters the battlefield, it triggers.
3. Holding priority, activate Phyrexian Altar by sacrificing Battalion Foot Soldier, adding .
4. Battalion Foot Soldier is put on the bottom of your library instead of into your graveyard due to Wheel of Sun and Moon.
5. Resolve the Battalion Foot Soldier trigger from step 2, searching your library for Battalion Foot Soldier and putting it into your hand.
6. Repeat.

This clever loop begins with the cost-reduction of Heartless Summoning, which allows you to cast Battalion Foot Soldier entirely for free. As it enters the battlefield, its triggered ability lets you tutor for copies, while Phyrexian Altar is simultaneously ready to sacrifice it for a mana. Crucially, Wheel of Sun and Moon intercepts the dying soldier, tucking it straight to the bottom of your library rather than your graveyard so you can perpetually find it again.